The RAM performance is below what I expect!
The RAM performance is below what I expect!
You're seeing a confusing mix of speeds here. The BIOS lists 2666MHz total, but your RAM is only 4GB with 2666MHz per stick. That means each stick is actually running at 1333MHz (half the total). When you remove one stick, you're left with just one 4GB stick at 1333MHz, which explains why the Task Manager still shows 1333MHz. It's normal for BIOS to report this way. No action needed unless you want a different configuration.
DDR speed is 2666 MHz, which matches the expected double data rate of 1333 x 2. Everything is functioning properly.
I understand your confusion. It seems the speed was divided between two sticks, but now it's only working with one stick. The reason might be that the split wasn't properly balanced anymore. Just try adjusting how you split the task to see if it improves performance.
They're wrong about splitting; it's per stick only. The full speed is shown on CPU-Z for individual rates.
nope ddr refers to its ability to transmit data through changes in the signal's amplitude and frequency, unrelated to the number of pins. The actual signal operates at 1333 MHz, while the data transmission speed reaches 2666 MHz.
Everyone has been very supportive already, so I’ll just restate that. Be sure to confirm if you mean dual channel versus DDR Dual channel, which doubles bandwidth by using two dimmers simultaneously. When you had two slots filled, DDR4 employs dual data rates, whereas software usually only shows a single rate.
Dual channel refers to handling two memory sticks simultaneously. Each stick operates at 64 bits per cycle—this means every time you access or store information, 64 bits are transferred through its pins. Imagine each pulse as a signal of energy... the memory controller detects these pulses rising and falling. One complete cycle equals one tick, one cycle, one frequency. DDR memory sticks can deliver 64 bits per pulse, and after reaching the peak, they start again with a fresh set. Thus, for every cycle, you receive 128 bits. That's why dual channel is called double the frequency—it suggests a faster performance compared to older SDRAM models, even though both run at the same speed. Dual channel allows reading and writing from both sticks at once. Suppose you need to write 4 KB (4096 bytes) of data—equivalent to 32 bits per second. With single-channel, you'd read it at 32 bits per cycle. But in dual channel, half the data is processed on each stick per cycle, doubling the throughput. It's similar to writing with both hands on two sheets, completing the task much quicker. However, it doesn't always double speed because memory sticks need time to process commands and prepare data before sending it out. Once ready, they can be sent in bursts. If a large amount is needed, you might see a performance boost—like reducing the wait from 10 nanoseconds to just 4, or from 10 to 2 nanoseconds for transfer. But if both sticks operate at 10 nanoseconds each, preparing data and sending it, the total remains similar. It's not simply two times faster unless the system is optimized.